be.SIRAPRISE.util

Class ByAttributesTupleBufferOrderer

java.lang.Object

be.SIRAPRISE.util.TupleBufferOrderer

be.SIRAPRISE.util.ByAttributesTupleBufferOrderer

All Implemented Interfaces:

java.util.Comparator<TupleBuffer>

public final class ByAttributesTupleBufferOrderer
extends TupleBufferOrderer

A ByAttributesTupleOrderer is a Comparator used in ordering tuples that compares attribute values drawn from the tuples to be compared. Several attributes can be specified, they will determine the comparison result between the two tuples in the sequence as they are specified.

Author:

Erwin Smout

Constructor Summary

Constructors

Constructor and Description
ByAttributesTupleBufferOrderer(java.util.List<NameIdentifier> orderingAttributeNames, Heading relvarHeading) Creates the ByAttributes comparator
ByAttributesTupleBufferOrderer(java.util.List<java.lang.String> orderingAttributeNames, Heading relvarHeading, StringToNameIdentifierTransformer t) Creates the ByAttributes comparator
ByAttributesTupleBufferOrderer(java.lang.String singleOrderingAttribute, Heading heading) Creates the ByAttributesTupleBufferOrderer for a single ordering attribute

Method Summary

Modifier and Type	Method and Description
int	compare(TupleBuffer o1, TupleBuffer o2)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

ByAttributesTupleBufferOrderer

public ByAttributesTupleBufferOrderer(java.util.List<NameIdentifier> orderingAttributeNames,
                                      Heading relvarHeading)

Creates the ByAttributes comparator

Parameters:

orderingAttributeNames - -

relvarHeading - -

ByAttributesTupleBufferOrderer

public ByAttributesTupleBufferOrderer(java.util.List<java.lang.String> orderingAttributeNames,
                                      Heading relvarHeading,
                                      StringToNameIdentifierTransformer t)

Creates the ByAttributes comparator

Parameters:

orderingAttributeNames - -

relvarHeading - -

t - -

ByAttributesTupleBufferOrderer

public ByAttributesTupleBufferOrderer(java.lang.String singleOrderingAttribute,
                                      Heading heading)

Creates the ByAttributesTupleBufferOrderer for a single ordering attribute

Parameters:

singleOrderingAttribute - -

heading - -

Method Detail

compare

public int compare(TupleBuffer o1,
                   TupleBuffer o2)